the left side of the chain is looser than a 50yr old prostitute, and the old datsun tech i have helping (and teaching) me said thats a sign it could have jumped. also, when you crank it, it pushes air out through the intake, and one time it spit fire through the intake.
compression test is as follows...
#1 130
#2 120
#3 125
#4 130
#5 125
#6 130
im tempted to just sell it for for 150$ and save up for a 260.
its got some good parts on it at least....